JP4037210B2 - Anti-theft device and anti-theft system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-theft device and an anti-theft system suitable for use in construction machines, which prevent theft.
[0002]
[Prior art]
As a construction machine equipped with an anti-theft device, for example, as disclosed in Japanese Patent No. 3233573, when a predetermined password is not input from a key input device, a starter circuit is provided even if an engine start operation is performed. It is known that the engine does not operate and engine start is prohibited. In addition, there is a password that can be changed so that the user can easily remember it.
[0003]
[Problems to be solved by the invention]
However, when a construction machine equipped with such an anti-theft device is used by a rental company, the rental company must enter the correct security code if the security code changed by the borrower is not communicated to the rental company when returning the construction machine. The engine starting process was complicated. In other words, it was necessary for a construction machine administrator, a service company, a manufacturer's staff, etc. to go to the construction machine operation site and start the engine, and the construction machine could not be started quickly.
[0004]
The object of the present invention is to prevent theft of a vehicle that can be driven quickly even if the security code is changed by a third party and the vehicle owner or administrator cannot enter the correct security code. It is to provide a device and an anti-theft system.
[0005]
[Means for Solving the Problems]
(1) An anti-theft device according to the invention of claim 1In an anti-theft device mounted on a mobile object,Storage means for storing a personal identification number, change means for changing the personal identification number stored in the storage means, initialization means for initializing the personal identification number stored in the storage means, and input means for inputting the personal identification number And the password entered from the input means and the password stored in the storage means are compared, and it is determined that the password entered from the input means matches the password stored in the storage means. ThenMoving bodyWhen the operation permission signal is output and it is determined that they do not match,Moving bodyComparison output means for outputting the operation prohibition signal ofThe valid period storage means for storing the validity period of the personal identification number and the date and time measurement means for measuring the current date and time, and the initialization means stores the current date and time measured by the date and time measurement means in the validity period storage section. The personal identification number stored in the storage means is initialized when the valid period has elapsed.
(2) The invention of claim 2 is the anti-theft device according to claim 1,The initialization means initializes the personal identification number stored in the storage means when receiving an initialization signal from the outside.
(3) Invention of Claim 3The anti-theft device according to the present invention is the anti-theft device mounted on the mobile body, the storage means for storing the password, the changing means for changing the password stored in the storage means, and the password stored in the storage means. An initialization means for initializing a number, an input means for inputting a personal identification number, a personal identification number input from the input means, and a personal identification number stored in the storage means are compared and input from the input means If it is determined that the personal identification number matches the personal identification number stored in the storage means, the mobile unit outputs a driving permission signal. If the personal identification number does not match, the comparison output means outputs a driving prohibition signal for the mobile unit, and theft. Transmitting means for wirelessly transmitting an ID number for identifying the mobile body on which the prevention device is mounted to the outside of the mobile body, and the initialization means transmits the initialization signal transmitted in response to the signal transmitted from the transmission means. Wherein the initializing the personal identification number stored in the storage means to receive.
(4) Invention of Claim 4The anti-theft device according to the present invention is an anti-theft device mounted on a mobile body, wherein a storage means for storing a personal identification number, a change means for changing the personal identification number stored in the storage means, and an initialization signal from outside the mobile body Initializing means for initializing the personal identification number stored in the storage means, the input means for inputting the personal identification number, the personal identification number input from the input means, and the personal identification number stored in the storage means If the password entered from the input means matches the password stored in the storage means, a driving permission signal is output from the moving body. The output signal includes a comparison output means for outputting the operation prohibition signal, and the initialization signal includes an ID number for identifying the mobile body on which the antitheft device is mounted. The initialization means includes an ID included in the initialization signal. Number There characterized by initializing only the personal identification number stored in the storage means when it is determined to be of the moving body itself for mounting the anti-theft device.
(5) The invention of claim 5Any one of claims 1, 2, 4The antitheft device according to claim 1, further comprising: a starter key having a transmitter for transmitting an initialization signal; and a reception unit for receiving the initialization signal transmitted from the starter key, wherein the initialization unit is initialized by the reception unit. When the encryption signal is received, the personal identification number stored in the storage means is initialized.
(6) The invention of claim 6Claim 2 or claim 3In the antitheft device described in the above, the initialization signal includes an ID number for identifying the mobile body on which the antitheft device is mounted, and the initialization unit includes the ID number included in the initialization signal as the antitheft device. The personal identification number stored in the storage means is initialized only when it is determined that the mobile body is equipped with the mobile device itself.
(7) The anti-theft system according to the invention of claim 7Storage means for storing a personal identification number, changing means for changing the personal identification number stored in the storage means, and initialization for initializing the personal identification number stored in the storage means when an initialization signal is received from the outside And a password input from the input means and a password stored in the storage means, and the password entered from the input means is stored in the storage means. PIN number And a comparison output means for outputting a driving prohibition signal of the moving body when it is determined that they do not coincide with each other.An anti-theft device and a center server that is installed at a location away from the anti-theft device and communicates with the anti-theft device via a communication line network and transmits an initialization signal.
(8) The anti-theft system according to the invention of claim 8Claim 3The anti-theft device described in 1), a receiver that receives the ID number transmitted by the transmission means, and a device that is installed at a location away from the anti-theft device and receives the ID number from the receiver, theft via the communication network And a center server that communicates with the prevention device and transmits an initialization signal.
(9) Invention of Claim 9The anti-theft device according to the present invention is the anti-theft device mounted on the mobile body, the storage means for storing the password, the changing means for changing the password stored in the storage means, and the password stored in the storage means. An initialization means for initializing a number, an input means for inputting a personal identification number, a personal identification number input from the input means, and a personal identification number stored in the storage means are compared and input from the input means Comparing output means for outputting a driving permission signal for the mobile body when it is determined that the personal identification number matches the personal identification number stored in the storage means, and for outputting a driving prohibition signal for the mobile body when it is determined that they do not match. The initialization means isWhen a PIN is entered more than a predetermined number of times from the input means,The personal identification number stored in the storage means is initialized.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
――― First embodiment ―――
A first embodiment when the present invention is applied to an anti-theft device for a hydraulic excavator will be described with reference to FIGS. A description will be given using a hydraulic excavator as an example of a construction machine. FIG. 1 is an overall configuration diagram in the present embodiment. In the present embodiment, when the engine 2 of the excavator 100 is started, the input personal identification number is collated, and the engine start is permitted only when the collation result is good. In the present embodiment, the personal identification number input when starting the engine 2 is a combination of five digits, and can be freely changed by the user (operator). When a specific signal is received from the outside, or when a set period has passed, the personal identification number of the excavator 100 is set to an initial value determined in advance at the time of shipment from the manufacturer.
[0007]
In FIG. 1, an excavator 100 includes an engine 2 that drives the excavator 100, a starter motor 3 that starts the engine 2, a starter relay 7 that turns on and off the operation power of the starter motor 3, an engine key switch 6, A key switch starter relay 5 for turning on / off the power from the battery 4 by operating the engine key switch 6 and a main control unit 10 are provided. The starter relay 7 is interposed between the starter motor 3 of the engine 2 and the engine key switch starter relay 5. When the starter relay 7 is on, when the engine key switch starter relay 5 is turned on as the key switch 6 is operated, the starter motor 3 is driven and the engine 2 is started. On the other hand, when the starter relay 7 is off, even if the engine key switch 6 is operated, the starter motor 3 is not energized and the engine 2 is not started. The engine 2 drives a hydraulic pump (not shown) and controls the pump discharge oil with a control valve, thereby driving various actuators to perform excavation work, traveling, turning, and the like.
[0008]
The main control unit 10 includes an input unit 30 for inputting a password and selecting a function, a time measuring unit 12 for measuring the current date and time, and an effective period storage unit 13 for storing an effective period of the code number. I have. Further, the main control unit 10 includes a password initial value storage unit 14 that stores a password that is predetermined and can be changed only by a specific person under certain conditions (a password that cannot be changed by the user), and a condition described later. And a personal identification number storage unit 15 for storing a personal identification number that can be changed by the user. Further, the main control unit 10 changes the security code stored in the release signal output unit 16 and the security code storage unit 15 to the security code stored in the security code initial value storage unit 14 under certain conditions. A change unit 17 and a communication unit 18 are provided. The main control unit 10 compares the password entered from the input unit 30 with the password stored in the password storage unit 15 by the release signal output unit 16 and outputs a signal according to the verification result. The starter relay 7 is switched on / off. That is, the starter relay 7 is turned on only when the personal identification number input from the input unit 30 matches the personal identification number stored in the personal identification number storage unit 15. When the engine key switch 6 is operated at this time, the starter motor 3 is driven and the engine 2 is started.
[0009]
FIG. 2 is a diagram illustrating an example of the input unit 30. The input unit 30 includes a numeric keypad 31 for inputting a personal identification number and selecting a function, a display unit 32 for displaying input contents, and an indicator lamp 33 for indicating on / off of the starter relay 7. When the engine key switch 6 is turned on and waiting for input of a personal identification number, as shown in FIG. 2, the display unit 32 displays the characters “INPUT”, and the indicator lamp 33 indicates a locked state. An indicator lamp 331 next to the illustration is lit. When a password is input by pressing the numeric keypad 31, the characters “INPUT” displayed on the display unit 32 disappear and a “*” mark is displayed according to the number of digits of the input password. Is done. For example, when a 5-digit password is entered, “******” is displayed on the display unit 32. When the input code number is compared and collated by the release signal output unit 16 and coincides with the code number stored in the code number storage unit 15, the indicator lamp 331 is turned off and next to the illustration showing the unlocked state. A certain indicator light 332 lights up. When the number change button 311 is pressed, a code number change mode transition command is output to the release signal output unit 16, and the code number can be changed as will be described later. In addition, when the period setting button 312 is pressed together with a specific operation (described later), a command for shifting to the effective period setting mode is output to the release signal output unit 16, and the effective period can be set as will be described later. Become.
[0010]
The initial value of the personal identification number is input from the input unit 30 at the time of shipment from the manufacturer and stored in the personal identification number initial value storage unit 14. The initial value of the password can only be changed by the manufacturer. The initial value of the personal identification number is such as a company that owns and manages the hydraulic excavator 100, such as a company to which a user who has purchased the hydraulic excavator 100 belongs, or a rental company (contractor) of a construction machine. This is a number managed by the construction machinery manager of the company that owns (hereinafter referred to as the user company).
[0011]
In FIG. 1, a management center 200 is provided in a user company. The management center 200 is provided with a server computer 201. The server computer 201 can send and receive data to and from the excavator 100 via the communication line network 300 and the communication unit 18 provided in the main control unit 10 of the excavator 100.
[0012]
The excavator 100 is assigned an ID number that is assigned to each excavator and identifies each excavator. This ID number is used as a number for identifying each hydraulic excavator when data is transmitted and received between the server computer 201 and the hydraulic excavator 100 as will be described later.
[0013]
With reference to the flowchart shown in FIG. 3, the start processing of the excavator 100 by the password and the password change / effective period setting processing in the antitheft device according to the present embodiment will be described. This process is performed by a program executed by the release signal output unit 16 of the main control unit 10. When the engine key switch 6 is turned on, this program is activated, and waits until a password is input from the input unit 30 in step S101. If it is determined that the password has been input, the process proceeds to step S103, where it is determined whether or not the input number matches the password stored in the password storage unit 15. If an affirmative determination is made in step S103, the process proceeds to step S105, a signal for turning on the starter relay 7, that is, a signal for permitting driving of the vehicle is output, and the process proceeds to step S109. If a negative determination is made in step S103, the process proceeds to step S107, and a signal to turn on the starter relay 7 is not output, that is, the starter relay 7 remains off, and the process returns to step S101.
[0014]
In step S109, it is determined whether or not there is a command input for changing the password change mode from the input unit 30. If a negative determination is made in step S109, the process proceeds to step S115. If an affirmative determination is made in step S109, the process proceeds to step S111, the process proceeds to the password change mode, and waits until a new password is input from the input unit 30. If it is determined that a new password is input from the input unit 30, the process proceeds to step S113, the password stored in the password storage unit 15 is updated with the password entered in step S111, and the process proceeds to step S115. .
[0015]
In step S115, it is determined whether there is a command input from the input unit 30 for shifting to the valid period setting mode. As described above, when the period setting button 312 is pressed together with a specific operation, the command for shifting to the effective period setting mode is output to the release signal output unit 16. The specific operation is an operation that is not performed in a normal switch operation such as a combination operation of a plurality of switches, and is an operation that only a specific person such as a construction machine manager in a user company knows. If a negative determination is made in step S115, the process proceeds to step S121. If an affirmative determination is made in step S115, the process proceeds to step S117, transitions to an effective period setting mode, and waits until an effective period is input from the input unit 30. If it is determined that there is an effective period input from the input unit 30, the process proceeds to step S119, and the effective period stored in the effective period storage unit 13 is updated with the effective period input in step S117. In step S121, it is determined whether or not the engine key switch 6 is off. If a negative determination is made in step S121, the process returns to step S109. If an affirmative decision is made in step S121, the process ends.
[0016]
With the above-described processing, when the user inputs a correct password into the input unit 30, the starter relay 7 is turned on, and the engine 2 of the excavator 100 can be started. When the number change button 311 of the input unit 30 is pressed from this state, the code number change mode is entered, and the code number can be changed. Further, when the period setting button 312 of the input unit 30 is pressed together with a specific operation, the period is changed to the effective period setting mode, and the effective period can be set.
[0017]
Since the password can be changed by the user (operator), it can be set to a number convenient for the user. However, when the borrower returns the rental code to the rental company with the password changed, such as in a rental machine, the changed password is not known, and the rental company may not be able to move the excavator 100. In such a case, if the changed password is returned to a previously set password (hereinafter referred to as an initial value) by some method, the above-mentioned worry can be eliminated. In this embodiment, the personal identification number is changed to an initial value (hereinafter referred to as initialization) after a certain period of time has elapsed or upon reception of a personal identification number initialization command transmitted from the server computer 201.
[0018]
In order to send a password initialization command from the server computer 201 of the management center 200 to the excavator 100, a manager of the user company that owns and manages the excavator 100 sends the ID number of the excavator 100 to the server computer 201. Need to be entered. FIG. 4 is a flowchart showing the operation of the server computer 201 provided in the management center 200. In step S201, it is determined whether an ID number is input. If an affirmative determination is made in step S201, the process proceeds to step S203, where the ID number and the password initialization command are transmitted to the excavator 100 via the communication line network 300, and the process ends. If a negative determination is made in step S201, the process ends.
[0019]
FIG. 5 shows a password initialization process in the main control unit 10 of the excavator 100. This process is performed by a program executed by the changing unit 17 of the main control unit 10. When the power from the battery 4 is supplied to the main control unit 10, this program is started. In step S151, the elapsed time measured by the time measuring unit 12 is compared with the effective period stored in the effective period storage unit 13. If it is determined in step S151 that the elapsed time is within the valid period, the process proceeds to step S153. In step S153, it is determined whether a signal from server computer 201 has been received. If an affirmative determination is made in step S153, the process proceeds to step S155, and it is determined whether or not the ID number of the excavator 100 matches the ID number included in the received signal. If an affirmative determination is made in step S155, the process proceeds to step S157, and it is determined whether or not the received signal includes a password initialization signal. If an affirmative determination is made in step S157, the process proceeds to step S159, in which the password stored in the password storage unit 15 is replaced with the initial value stored in the password initial value storage unit 14, that is, the password is changed. Initialize and end a series of operations.
[0020]
If it is determined in step S151 that the elapsed time has passed the valid period, the process proceeds to step S159. If a negative determination is made in step S153, step S155, or step S157, the process returns to step S151, respectively.
[0021]
Through the above-described processing, the excavator 100 stores the password number storage unit 15 when the valid period stored in the validity period storage unit 13 has elapsed or when a password initialization command is received from the server computer 201. Initialize the assigned password.
[0022]
For example, the operation method when the rental company rents the excavator 100 of the present embodiment to the user is as follows.
(1) The rental agent who has received the rental request inputs a period corresponding to the rental period from the input unit 30 to the validity period storage unit 13 and inputs the PIN code desired by the borrower to the PIN code storage unit 15. Rental excavator 100.
(2) When the rented hydraulic excavator 100 returns after the rental period, the personal identification number is initialized by the personal identification number initialization process in the main control unit 10 of the hydraulic excavator 100 described above. The rental company can start the excavator 100 by inputting a predetermined initial value to the input unit 30.
(3) When the rented hydraulic excavator 100 returns before the rental period expires, the personal identification number is initialized by transmitting a personal identification number initialization command from the center server 201 to the hydraulic excavator 100. Therefore, the rental company can start the excavator 100 by inputting a predetermined initial value to the input unit 30.
[0023]
As a result, the rental company of the hydraulic excavator 100 can start the hydraulic excavator 100 that has returned after the rental period has expired with the initial code number without performing any special operation. The excavator 100 that has returned before the rental period has expired can be started with an initial code number simply by transmitting an initialization signal from the server computer 201.
[0024]
In the antitheft device according to the first embodiment described above, the engine 2 of the excavator 100 can be started when the user inputs the correct password to the input unit 30. When the number change button 311 of the input unit 30 is pressed from this state, the code number change mode is entered, and the code number can be changed. Further, when the period setting button 312 of the input unit 30 is pressed together with a specific operation, the period is changed to the effective period setting mode, and the effective period can be set. When the validity period stored in the validity period storage unit 13 elapses or when a password initialization command is received from the server computer 201, the password stored in the password storage unit 15 is initialized. .
[0025]
The antitheft device according to the first embodiment described above has the following operational effects.
(1) The personal identification number stored in the hydraulic excavator 100 is initialized after a certain period of time has elapsed or a signal from the server computer 201. Therefore, even if the secret code is changed by a third party and becomes unknown, it is not necessary to connect a special device for decoding the secret code. Even without going to 100, the excavator 100 can be started quickly.
(2) Even if the excavator 100 is stolen at the borrower, since the personal identification number can be initialized by a signal from the server computer 201, the thief can be prevented from starting the excavator 100. high.
[0026]
――― Second embodiment ―――
The antitheft device according to the second embodiment of the present invention will be described with reference to FIGS. In the anti-theft device according to the present embodiment, a non-contact ID tag is provided in the hydraulic excavator 100 of the first embodiment described above, and a non-contact ID tag receiver is provided in the construction machine pool. When the excavator 100 returns to the construction machine pool, the non-contact ID tag receiver of the construction machine pool reads the signal of the non-contact ID tag of the excavator 100 and transmits a password initialization signal to the server computer 201. Instruct. The hydraulic excavator 100 of the present embodiment is the same as that of the first embodiment except for the non-contact ID tag 20 described later, and thus detailed description thereof is omitted. The start processing of the excavator 100 and the password change / effective period setting processing shown in FIG. 3, the password initialization command transmission processing of the server computer 201 shown in FIG. 4, and the password initialization processing shown in FIG. Since it is the same as the first embodiment, the differences will be mainly described.
[0027]
FIG. 6 is a diagram showing the contactless ID tag receiver 250 and the management center 200 provided in the construction machine pool of the user company. The non-contact ID tag receiver 250 is provided, for example, at a construction machine pool entrance of a rental company, and is connected to the server computer 201 of the management center 200 installed by the rental company via a line. The hydraulic excavator 100 is provided with a non-contact ID tag 20. The non-contact ID tag 20 emits a weak radio wave whose ID number is modulated. The non-contact ID tag receiver 250 can obtain an ID number by demodulating radio waves emitted from the non-contact ID tag 20. The non-contact ID tag receiver 250 transmits the ID number obtained by demodulation to the server computer 201.
[0028]
When the server computer 201 receives the ID number transmitted from the contactless ID tag receiver 250, the server computer 201 transmits a password initialization command together with the received ID number via the communication network 300. The excavator 100 that has received the password initialization command together with the ID number executes the password initialization process shown in the flowchart of FIG. 5 described above, and initializes the password.
[0029]
FIG. 7 is a flowchart showing the operation of the server computer 201 of this embodiment. In step S211, it is determined whether the ID number transmitted from the non-contact ID tag receiver 250 has been received. If the determination in step S211 is negative, the process proceeds to step S212, and it is determined whether or not the ID number is directly input to the server computer 201. If a negative determination is made in step S212, the process returns to step S211.
[0030]
If a positive determination is made in step S211 or step S212, the process proceeds to step S213. In step S213, the ID number and the password initialization command are transmitted to the excavator 100 via the communication line network 300, and the series of operations ends.
[0031]
When the excavator 100 returns to the place where the non-contact ID tag receiver 250 is provided by the above processing, the ID number issued by the non-contact ID tag 20 provided on the excavator 100 is changed to the non-contact ID tag receiver 250. Received at. The non-contact ID tag receiver 250 transmits the received ID number of the excavator 100 to the server computer 201. The server computer 201 that has received the ID number transmitted from the contactless ID tag receiver 250 transmits a password initialization command together with the received ID number. The excavator 100 that has received the password initialization command together with the ID number is initialized with the password, and thus can be started with the initial password. Further, the personal identification number of the excavator 100 can be initialized by directly inputting the ID number into the server computer 201 without receiving the ID number issued by the non-contact ID tag 20 by the non-contact ID tag receiver 250.
[0032]
In the second embodiment described above, the following functions and effects are provided in addition to the functions and effects of the first embodiment.
(1) For example, when a construction machine rental company uses the hydraulic excavator 100 of the present embodiment, the non-contact ID tag receiver 250 is installed at the construction machine pool entrance managed by the rental company. After the excavator 100 is rented, when the excavator 100 returns and passes through the construction machine pool entrance, the non-contact ID tag receiver 250 receives a signal issued by the non-contact ID tag 20 of the excavator 100. Thereafter, since the personal identification number of the hydraulic excavator 100 is set to a predetermined initial value as described above, the rental company can return the hydraulic excavator 100 that has returned to the initial value personal code without any particular operation or the like. You can start with a number.
(2) If the excavator 100 does not pass the construction machine pool entrance for some reason, the personal identification number of the excavator 100 can also be initialized by directly entering the ID number into the server computer 201 of the management center 200. . As a result, the rental company can start the excavator 100 with the initial password.
[0033]
――― Third embodiment ―――
The antitheft device according to the third embodiment of the present invention will be described with reference to FIGS. In the anti-theft device according to the present embodiment, when the number of correct password input times exceeds a preset number, or by a signal from the engine operating key with a portable transmission terminal possessed by a manager or the like, Is initialized. FIG. 8 is an overall configuration diagram in the present embodiment. The hydraulic excavator 100 according to the present embodiment is the same as that of the first embodiment except for the configuration of the main control unit 10a and the operation key 40, which will be described later. Since the starting process of the excavator 100 and the password change / effective period setting process shown in FIG. 3 are the same as those in the first embodiment, detailed description thereof is omitted.
[0034]
As shown in FIG. 8, the main control unit 10 a includes an input number detection unit 25 that counts the number of input of a password and a limit value storage unit 26. The operating key 40 of the engine key switch 6 is provided with a transmitter 41. The transmitter 41 stores an ID number that is assigned to each hydraulic excavator and identifies each hydraulic excavator. When the push button 42 of the transmitter 41 is pressed, a signal including the ID number is transmitted. .
[0035]
FIG. 9 shows a password initialization process in the main control unit 10 a of the excavator 100. This process is performed by a program executed by the changing unit 17 of the main control unit 10a. When power from the battery 4 is supplied to the main control unit 10a, this program is started. In step S <b> 251, the number of inputs of the correct password counted by the input number detection unit 25 is compared with the limit number stored in the limit value storage unit 26. If it is determined in step S251 that the number of correct passwords input is within the limited number, the process proceeds to step S253, where it is determined whether a signal including an ID number has been received from the transmitter 41. If an affirmative determination is made in step S253, the process proceeds to step S255, in which it is determined whether or not the identification ID of the excavator 100 matches the identification ID included in the received signal. When an affirmative determination is made in step S255, the process proceeds to step S259, where the password stored in the password storage unit 15 is replaced with the initial value stored in the password initial value storage 14, that is, the password is initialized. To end the series of operations.
[0036]
If it is determined in step S251 that the number of correct passwords input exceeds the limit, the process proceeds to step S259. If a negative determination is made in step S253 or step S255, the initialization is not necessary and the processing is terminated.
[0037]
Through the above-described processing, the excavator 100 transmits a signal including the ID number transmitted from the transmitter 41 when the number of times of inputting a correct password exceeds the limit number stored in the limit value storage unit 26. When the password is received at 18, the password stored in the password storage unit 15 is initialized.
[0038]
For example, the operation method when the rental company rents the excavator 100 of the present embodiment to the user is as follows.
(1) The rental contractor who has received the rental request sends, from the input unit 30 to the limit value storage unit 26, a number greater than the estimated value of the number of times that the borrower user starts the engine 2 of the excavator 100 during the rental period. After inputting and inputting the code number desired by the borrower to the code number storage unit 15, the excavator 100 is lent together with the operation key not provided with the transmitter 41.
(2) When the rented excavator 100 returns to the rental agent, the engine key switch 6 is turned on by the operation key 40 with the transmitter 41 managed by the rental agent, and the ID number is transmitted from the transmitter 41. Send the containing signal. The excavator 100 that has received the signal from the transmitter 41 initializes the password by the password initialization process described above. Therefore, the rental dealer can start the excavator 100 by inputting a predetermined initial value to the input unit 30.
[0039]
The third embodiment described above has the following effects.
(1) A person in charge of management, such as a company that owns and manages the excavator 100, can initialize the password using the operation key 40 with the transmitter 41 owned by the person in charge of management. Other equipment and special operations are unnecessary, so it is simple and low in cost.
(2) Even if the thief obtains the correct password at the excavator's lender and steals the excavator 100, the password will be initialized if the number of times the correct password is entered exceeds the limit. The start of the excavator 100 can be prevented, and the security is high.
[0040]
――― Modifications ――――
The code number has been described with an example of numbers, but it may be either a letter or a symbol, or a combination thereof, such as an ID number or a password that can be identified by the authorized person. That's fine. Furthermore, instead of the in-vehicle communication device, a mobile phone, a personal digital assistant (PDA), or a mobile personal computer may be used. The management center 200 in which the server computer 201 is installed is not limited to a construction machine rental company or a company that owns a construction machine, and may be installed in a construction machine manufacturer. When the management center 200 is installed in a construction machine manufacturer, the management person in charge of the construction machine manufacturer who has received a notification from the operator may input the ID number of the hydraulic excavator into the server computer.
[0041]
In the third embodiment described above, the personal identification number may be initialized when the number of erroneous input of the personal identification number exceeds a certain number of consecutive times. In this case, the person in charge of management can input the appropriate number several times to initialize the password, and then input the initial value to start the excavator 100.
[0042]
Although the example in which the start of the engine 2 is prohibited by not turning on the starter relay 7 when the passwords do not match is shown, for example, as described in Japanese Patent No. 3233573, the pilot hydraulic circuit is shut off. The excavator 100 may be prevented from traveling. Specifically, a switching valve (for example, a solenoid valve) is provided in the discharge circuit of the pilot hydraulic pump, and when the correct password is input, the switching valve is set to the communication position, and in other cases, the switching valve is set. May be switched to the blocking position. When the switching valve is in the shut-off position, even if each operation member is operated, each attachment and turning actuator, including the traveling hydraulic motor, are not driven. This also prevents theft.
[0043]
Each password initialization method described in each embodiment and modification may be used individually or in combination. In each of the above-described embodiments and modifications, a hydraulic excavator is used as a construction machine, but the present invention is not limited to this. Moreover, it is not restricted to construction machinery. The present invention can also be applied to various mobile objects such as a vehicle rented to a user such as a rental car. Furthermore, the present invention is not limited to the above-described embodiment as long as the characteristic functions of the present invention are not impaired.
[0044]
In each of the above embodiments and modifications thereof, the storage means is valid in the valid period storage section 13, the change means is in the change section 17, the input means is in the input section 30, and the comparison output means is in the release signal output section 16. The period storage unit corresponds to the effective period storage unit 13, and the date / time measurement unit corresponds to the time measurement unit 12. The transmission means corresponds to the non-contact ID tag 20, the starter key corresponds to the operation key 40, the reception unit corresponds to the communication unit 18, and the receiver corresponds to the non-contact ID tag receiver 250. The initialization means includes a password initial value storage unit 14 and a change unit 17.
[0045]
【The invention's effect】
According to the present invention, even if a third party changes the password, the password of the anti-theft device can be changed to a predetermined initial value. This makes it possible to drive the vehicle.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram in a first embodiment in which the present invention is applied to a hydraulic excavator.
FIG. 2 is a diagram illustrating an input unit 30 in FIG.
FIG. 3 is a flowchart showing a start process and a password change / effective period setting process of the excavator 100 according to the first embodiment.
FIG. 4 is a flowchart showing an operation of a server computer 201 provided in the management center 200 of the first embodiment.
FIG. 5 is a flowchart showing a password initialization process in the main control unit 10 of the excavator 100 according to the first embodiment.
6 is a diagram showing a non-contact ID tag receiver 250 and a management center 200 provided in a construction machine pool of a user company according to a second embodiment in which the present invention is applied to a hydraulic excavator. FIG.
FIG. 7 is a flowchart showing an operation of a server computer 201 provided in the management center 200 of the second embodiment.
FIG. 8 is an overall configuration diagram in a third embodiment in which the present invention is applied to a hydraulic excavator.
FIG. 9 is a flowchart showing a password initialization process in the main control unit 10a of the excavator 100 according to the third embodiment.
[Explanation of symbols]
2 Engine 3 Starter motor
5 Key switch starter relay 6 Engine key switch
7 Starter relay 10, 10a Main control unit
12 hours measurement unit 13 effective period storage unit
14 PIN Number Initial Value Storage Unit 15 PIN Number Storage Unit
16 Release signal output unit 17 Change unit
18 Communication unit 20 Non-contact ID tag
25 Input Count Detection Unit 26 Limit Value Storage Unit
30 Input section 40 Operation key
41 Transmitter 42 Push button
200 management center 201 center server
250 contactless ID tag receiver 300 communication network

Claims (9)

In an anti-theft device mounted on a mobile object,
Storage means for storing a personal identification number;
Changing means for changing the password stored in the storage means;
Initialization means for initializing a password stored in the storage means;
An input means for inputting a personal identification number;
The password entered from the input means is compared with the password stored in the storage means, and the password entered from the input means matches the password stored in the storage means. If it is determined, the operation output signal of the mobile body is output, and if it does not match, the comparison output means for outputting the operation prohibition signal of the mobile body ,
Effective period storage means for storing an effective period of the personal identification number;
A date and time measuring means for measuring the current date and time,
The initialization means initializes the password stored in the storage means when the current date and time measured by the date and time measurement means has passed the effective period stored in the effective period storage unit. Anti-theft device characterized by The anti-theft device according to claim 1,
The anti-theft device characterized in that the initialization means initializes a personal identification number stored in the storage means when receiving an initialization signal from the outside. In an anti-theft device mounted on a mobile object,
Storage means for storing a personal identification number;
Changing means for changing the password stored in the storage means;
Initialization means for initializing a password stored in the storage means;
An input means for inputting a personal identification number;
The password entered from the input means is compared with the password stored in the storage means, and the password entered from the input means matches the password stored in the storage means. If it is determined, the operation output signal of the mobile body is output, and if it does not match, the comparison output means for outputting the operation prohibition signal of the mobile body,
Transmission means for wirelessly transmitting an ID number for identifying a mobile body on which an antitheft device is mounted to the outside of the mobile body,
The anti-theft device, wherein the initialization means initializes a personal identification number stored in the storage means when receiving an initialization signal transmitted in response to a signal transmitted from the transmission means. In an anti-theft device mounted on a mobile object,
Storage means for storing a personal identification number;
Changing means for changing the password stored in the storage means;
Initialization means for initializing a personal identification number stored in the storage means when an initialization signal is received from outside the mobile body;
An input means for inputting a personal identification number;
The password entered from the input means is compared with the password stored in the storage means, and the password entered from the input means matches the password stored in the storage means. When it is determined, the operation output signal of the moving body is output, and when it is determined that they do not match, a comparison output unit that outputs an operation prohibition signal of the mobile body is provided,
The initialization signal includes an ID number that identifies the mobile body on which the anti-theft device is mounted,
The initialization means initializes the personal identification number stored in the storage means only when it is determined that the ID number included in the initialization signal is that of the mobile body equipped with the antitheft device. Anti-theft device characterized in that. The anti-theft device according to any one of claims 1, 2, 4
A starter key having a transmitter for transmitting an initialization signal;
A receiver for receiving an initialization signal transmitted from the starter key;
The anti-theft device, wherein the initialization means initializes a personal identification number stored in the storage means when the receiving section receives the initialization signal. The anti-theft device according to claim 2 or claim 3 ,
The initialization signal includes an ID number that identifies a mobile body equipped with an anti-theft device,
The initialization means initializes the personal identification number stored in the storage means only when it is determined that the ID number included in the initialization signal is that of the mobile body equipped with the antitheft device. Anti-theft device characterized in that. Storage means for storing a personal identification number, change means for changing the personal identification number stored in the storage means, and initialization of the personal identification number stored in the storage means when an initialization signal is received from the outside The initialization means, the input means for inputting the personal identification number, the personal identification number inputted from the input means, and the personal identification number stored in the storage means are compared, and the personal identification number inputted from the input means is When it is determined that it matches the password stored in the storage means, it outputs a driving permission signal for the moving body, and when it does not match, it has comparison output means for outputting a driving prohibition signal for the moving body. An anti-theft device,
An anti-theft system comprising: a center server installed at a location away from the anti-theft device, and communicating with the anti-theft device via a communication network and transmitting an initialization signal. An anti-theft device according to claim 3 ,
A receiver for receiving an ID number transmitted by the transmission means;
A center server installed at a location away from the anti-theft device and transmitting an initialization signal by communicating with the anti-theft device via a communication network upon receipt of an ID number from the receiver; Anti-theft system characterized by In an anti-theft device mounted on a mobile object,
Storage means for storing a personal identification number;
Changing means for changing the password stored in the storage means;
Initialization means for initializing a password stored in the storage means;
An input means for inputting a personal identification number;
The password entered from the input means is compared with the password stored in the storage means, and the password entered from the input means matches the password stored in the storage means. When it is determined, the operation output signal of the moving body is output, and when it is determined that they do not match, a comparison output unit that outputs an operation prohibition signal of the mobile body is provided,
Wherein the initialization means, when the personal identification number from said input means is inputted a predetermined number of times or more, the anti-theft device, characterized in that for initializing a personal identification number stored in the pre-term memory means.

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